General Information

Event name: AU-18-001
Nature of the harmful event:
Water Discoloration , High Phyto concentration , Mass mortalities
Event directly affected:
Natural Fish
Toxicity detected: No
Associated syndrome: OTHER
Unexplained toxicity:
Species implicated in toxin transmission (transvector):
Report the outcome of a monitoring programme: No
Event occurred before in this location: Yes
Individuals to contact: Hallegraeff Gustaaf

Location & Date

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Location: Latitude: , Longitude:
General location information: Darling River,
HAB Area code(s): AU-16
Additional location information: 50 km stretch of Darling River, Menindee region
Bloom event dates (yyyy/mm/dd): Event Date:2018-12-19
End: 2019-01-30
Quarantine levels dates (yyyy/mm/dd):
Additional date-related information:


Causative organism known: No
Causative Species/Genus:
Co-Ocurring Species/Genus: Chrysosporum sp. ( cells/L)
Chlorophyll concentration, if known: µg/l
Additional bloom information:
Event-related bibliography:

Environmental Conditions

Weather: Turbidity (NTU): Wind direction:
Stratified water: Oxygen content (nL/L): Wind velocity:
Temperature (°C): Oxygen saturation %: Current Direction:
Sechhi disk (m): Salinity: Current Velocity:
Nutrient information:
Temperature Range During Event: Max: 49 °C, Min: 23 °C
Salinity Range During Event:
Bloom location in the water column:
Growth Comments
Additional Environmental information: reduced river flow, high water temperature, low oxygen

Toxin Assay Information

Species containing the toxin Toxin type Toxin details Max. concentration Assay type
Kit used: Type of kit used:
Additional information:
Economic losses:
Management decision: crisis meeting on water flows; calls for Royal Commission
Additional harmful effect information: A million fish dead, including bony bream, Murray cod, and perch. Some cod claimed to be 50+ years old.
Created at 05:09 on 14 Jan 2019
Updated at 05:52 on 2 May 2019